A "corrected" mixing study result is a PT or aPTT result within a normal range of the pooled standard plasma control or approximately 10% of the normal range. A PT or aPTT test significantly prolonged at baseline may not completely correct to within the average reference interval on a 1:1 mix.
"No correction" would mean that the patient sample/pooled standard plasma mixture had no significant decrease in clotting time for the PT or aPTT compared to the initial PT/aPTT results.